ArticleBMC genomics2020
Genetic architecture and genomic selection of female reproduction traits in rainbow trout.
Article in BMC genomics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed.
- Genome-Wide Association Study SuggestsCurrent issues in molecular biology · 2026Article
- Remarkable heterogeneity revealed in the genetic architecture of resistance to a key bacterial pathogen in two commercial rainbow trout populations.BMC genomics · 2025Article
- Genetic and Environmental (Co)variation of Egg Size, Fecundity, and Growth Traits in Arctic Charr.Evolutionary applications · 2025Article
- Genetic diversity of Olive flounder (Paralichthys olivaceus) and the impact of selective breeding on Korean populations.PloS one · 2025Article
- Evolution of Size-Fecundity Relationship in Medaka Fish From Different Latitudes.Molecular ecology · 2024Article
- Genomic Signatures of Domestication in European Seabass (Ecology and evolution · 2024Article
- Genome-wide detection of positive and balancing signatures of selection shared by four domesticated rainbow trout populations (Oncorhynchus mykiss).Genetics, selection, evolution : GSE · 2024Article
- Potential of low-density genotype imputation for cost-efficient genomic selection for resistance to Flavobacterium columnare in rainbow trout (Oncorhynchus mykiss).Genetics, selection, evolution : GSE · 2023Article
- Editorial: Genetics of reproduction for livestock species.Frontiers in genetics · 2023Article
- Temporal and region-specific variations in genome-wide inbreeding effects on female size and reproduction traits of rainbow trout.Evolutionary applications · 2022Article
- Strategies to improve the accuracy and reduce costs of genomic prediction in aquaculture species.Evolutionary applications · 2022Article
- Development of a High-Density 665 K SNP Array for Rainbow Trout Genome-Wide Genotyping.Frontiers in genetics · 2022Article
- Genomic Selection in Aquaculture Species.Methods in molecular biology (Clifton, N.J.) · 2022Article
- Optimization of Genomic Selection to Improve Disease Resistance in Two Marine Fishes, the European Sea Bass (Frontiers in genetics · 2021Article
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Authors and funding
10 authors.
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Abstract
backgroundRainbow trout is a significant fish farming species under temperate climates. Female reproduction traits play an important role in the economy of breeding companies with the sale of fertilized eggs. The objectives of this study are threefold: to estimate the genetic parameters of female reproduction traits, to determine the genetic architecture of these traits by the identification of quantitative trait loci (QTL), and to assess the expected efficiency of a pedigree-based selection (BLUP) or genomic selection for these traits.
resultsA pedigreed population of 1343 trout were genotyped for 57,000 SNP markers and phenotyped for seven traits at 2 years of age: spawning date, female body weight before and after spawning, the spawn weight and the egg number of the spawn, the egg average weight and average diameter. Genetic parameters were estimated in multi-trait linear animal models. Heritability estimates were moderate, varying from 0.27 to 0.44. The female body weight was not genetically correlated to any of the reproduction traits. Spawn weight showed strong and favourable genetic correlation with the number of eggs in the spawn and individual egg size traits, but the egg number was uncorrelated to the egg size traits. The genome-wide association studies showed that all traits were very polygenic since less than 10% of the genetic variance was explained by the cumulative effects of the QTLs: for any trait, only 2 to 4 QTLs were detected that explained in-between 1 and 3% of the genetic variance. Genomic selection based on a reference population of only one thousand individuals related to candidates would improve the efficiency of BLUP selection from 16 to 37% depending on traits.
conclusionsOur genetic parameter estimates made unlikely the hypothesis that selection for growth could induce any indirect improvement for female reproduction traits. It is thus important to consider direct selection for spawn weight for improving egg production traits in rainbow trout breeding programs. Due to the low proportion of genetic variance explained by the few QTLs detected for each reproduction traits, marker assisted selection cannot be effective. However genomic selection would allow significant gains of accuracy compared to pedigree-based selection.
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